By 1978, the company acquired two 44-seat Hawker Siddeley HS 748 turboprops (tail registrations N748LL and N749LL), which were mostly used to connect Springfield, Illinois, with Chicago's Meigs Field.

The company's two letter identifier was UX although the Official Airline Guide (OAG) states that Air Illinois also used the QX code for its stand-alone intrastate airline operation in Illinois between Chicago Meigs Field and the state capital in Springfield.

SCAT flew three of the 18 passenger Handley Page HP.137 MK1 Jetstream and two of the Frakes Pratt & Whitney PT-6 modified HP.137's (tail registrations N11DN and N7RJ).

In addition, the company entered into agreements with the federal government and an Atlantic City-based casino to operate charter flights.

This fact, along with substantially lower passenger loads, led airline officials to cease operating and file for Chapter 11 bankruptcy in April 1984.